Get a Valais Blacknose Sheep early. You need 4 wool for the late storyline and it takes some time to mature. Also, do not fill your barn with 3 other animals as its expensive and difficult to upgrade it. Just leave a slot open for this sheep.You will need chamomile in the midst of the story. You can find the seeds in Pastilla.Which terrain is forest? My best guess is the Coffee Tree Area and later the Goddess Spring Farm. Because the background looks similar (see picture - Plains, Beach, Coffee, Desert, Mountain, Snow, Goddess Farm - Yes I thought about it quite some time....).If you suddenly need a item ASAP check the requests and reload the night until the requests pops up. Typical candidates might be Ginko Wood, Milk and Jersey-Milk or various Fish. Keep in mind the active requests are somewhat limited, so maybe solve another request from the same area or person.